What is the Chinooks indians region?

The Chinook Indians have lived (and still do) in their ancestral homelands for about 10,000 years. The ancestral homeland of the Chinook people is:

From West to East from the mouth of the Columbia River East to the present day Oregon city The Dalles. And from North to south from the present day Washington town of Grayland South to the Oregon town of Tillamook.